I am looking at buying a new tig welder. I used the 225 over the weekend and liked it. I have never tried or even looked at the 200 from miller before. I was wondering which welder would be a better welder. They look to be similar in specs. I am looking to do aluminum and sheet metal. I don't expect to do real thick metal. I don't think I need a water cooled torch, since I want be welding for long periods of time. I am not ruling out a water cooled one though. Which one would have a better resale value, or are they about the same. Thanks for any information.